The practice of tower dumps allows authorities to gather cell phone records from a specific tower during a certain period of time
A federal judge in Nevada has ruled that the use of “tower dumps” — a law enforcement technique to access large volumes of cell phone data — is unconstitutional. However, in a notable twist, the same ruling allows the data obtained through this method to still be used as evidence in court.
The practice of tower dumps allows authorities to gather cell phone records from a specific tower during a certain period of time. Although the aim may be to track a single suspect, these dumps can reveal information from thousands of devices, raising serious privacy concerns.
In a case that dates back to 2010 involving the so-called High Country Bandits, police successfully apprehended two bank robbers using a tower dump that exposed data from more than 150,000 phone numbers. Such examples have helped establish the method as a common investigative tool, despite ongoing legal and ethical debates.
In the most recent case, Judge Miranda Du of the US District Court in Nevada found that the use of tower dumps violates the Fourth Amendment of the US Constitution, which protects individuals against unreasonable searches and seizures. The court found that accessing such a large quantity of personal data without a specific warrant amounted to an overreach.
Despite this finding, Judge Du denied a motion to suppress the evidence obtained through a tower dump in the case against Nevada resident Cory Spurlock. Spurlock faces serious charges, including conspiracy to commit murder-for-hire and conspiracy to distribute marijuana.
The tower dump in question exposed the data of 1,686 mobile users. While Du acknowledged the constitutional issue, she cited the “good faith exception” — a legal principle that allows evidence collected in violation of a person’s rights to be admitted in court if law enforcement officials were acting under the belief that their actions were legal at the time.
“The Court acknowledges that it appears to be the first within the Ninth Circuit to reach this conclusion and the good faith exception applies,” the judge stated in her ruling.
This decision follows a similar case from earlier this year, when a federal judge in Mississippi ruled against the FBI’s use of tower dumps to collect information across nine locations and four telecom carriers. That ruling barred the evidence from being used, and the US Department of Justice has since filed an appeal.
The debate over tower dumps is part of a broader conversation in the US about the balance between digital privacy and law enforcement powers. As courts continue to evaluate these methods, rulings like Judge Du’s suggest that while the practice may face increasing legal scrutiny, the transition to more privacy-conscious policing will be gradual.
